“Because the shield boss and the coins all date from about the same time and because they are all in good condition and haven’t been dragged over the sea bed, we believe they were lost in a shipwreck,” said Alex.

“It looks likely that Junius was heading into the Tyne from Germany – probably in a fleet of around 12 ships – when a storm broke and his ship sank.”

No trace of the vessel has been found.

“There are so many shipwrecks at the mouth of the Tyne that a few rotting timbers would be impossible to locate,” said Alex.

It can only be speculated if Junius went down with the ship.

“It is wonderful, though, that, thanks to the generosity of the British Museum, we are able to see this magnificent addition to his armour for ourselves,” said Mayor of South Tyneside Fay Cunningham. “This region has played a pivotal part in the military, cultural and religious life of the UK and it’s fascinating to find out more about the man who owned the shield boss – it brings history to life.”

The Glory of Rome is part of a major, three-year Treasures programme, highlighting the region’s heritage and identity.

The exhibition will be on display at Arbeia Roman Fort until December and admission is free. For more information about the summer events programme visit www.arbeiaromanfort.org.uk .